Wheel-brake.



1. T. WESTWOOD.

WHEEL BRAKE. APPLICATION FILED APR. II, 1914.

1,138,767." I Patented May11,1915.

(70%1eflflasfwoad nap snares PATENT orator.

JOHN T. wnsrwoon, or WHEEL-ING, was! VIBG-INIA,;;A1SS;GN0B or onn-rocacrn To JAMES B. SOMERV-ILLE ANB QNE'1FOURTH EOGEORGE 1Q QF WHEELING,

WEST VIRGINIA:

wanna-names;

' ,Patented Mayil, 1915:;

a lication filed s; 1.1-, 1914. serial nor-seams.

To all whom it may concern I Be it knownathat 1, JOHN WEsrwooD, a citizen of the United States, residing at Wheeling, in the county of Ghio and State of West Virginia, have invented new and useful Improvements in .Wheel-Brakes, of which the following is a specification.

This invention relates to improvements; in wheel brakes of that type applied .to the hub of a Wheel andadjacent portion of .an axle,

. tages in viewthe invention consists in the preferred construction and arrangementof parts which will be more fully hereinafter described-andelaime'd. H

In the drawing: Figure I-is a perspective view of athe essential elements of the improved brake and'a portion dfan-a-xle. Fig. 2 is-a transverse vertical section through the brake elements as shown by. Fig. -1 and -a portion of the hub'of-a wheel. *Fig. 3 is a top plan view,- partially-broken away and in section, of the improved brakeelements and a portion of the hub =o'f-a wheeland axle. Fig. 4 is a detail-elevation-of-a portion of the improved brake looking' toward the inner side thereof and partially in section to illustrate-asliding dust guard. The=numeral 5 designatesan axleof-any preferred or -approved"type as now commonly used, and thereto is secured adisk or brake headed, by any suitable means, such for instance as an angle bracket 7. "The; axle 5 projects through the-center of the -disk;or

head 6 and outwardlyfifar -'enough from the latter -to receive 'the wheel, whichtin the present instance will have a-hub provided with an inwardly projecting brake coordinating elementorcollar-S having-its inner I edge snugly fitted in a-recess-or offset portion 9-ofthe diskor head-6. "Onthe outer side tithe-disk or'lhead'fi, segmental dogs or' frictional elements 10 are mounted-and have their lower ends reduced and -overlapped and pivoted, as at 11, the said dogs being normally held contracted or released from braking position by a spring 12 securedato :the upper portions .of the inner opposing-sides .above the axle 5, as clearly shown by-Fig. -1. In the upperpart of the disk or head 6 and freely movable in an opening 13 therethrough is a brake actuatzlever zlrl having an inner rectangular head -15 .supportediby anangle bracket '16 securedutmthedisk or head-above the axle 5,

thei head lanf the'iever being pivoted to the angle hracketalii by a pin 17 extending vertically Athrough the center thereof. The lever ledextendsiinwardly away from the disk or ahead 6 xanyssuitable distance andwill have -abra-Icing:lever or. other actuating device 18 attache drthereto, as shown-by Fig. l. The-usual formo'fabrake actuating levers or..conneetions will-be used in connection with -::this brake and be readily operable from a point adjacent to the seat of a driver or chauffeur of an automobile or similar motor lvehicle. f The opening 13 through which the lever 14 extends is sufficiently elongated-to permit-the said lever to be oscillated in a'horizontal plane to move the head 15a .snfiicient distance to set up a braking action of the dogs-10. The-head 15 of the lever is .located between and :loosely engages the upperiifree ends of the dogs 10 and is free Itowork oroscillate in opposite directions-soxthat thelimproved' brake may be readily applied in right and left position without modifying the structure thereof. The dogs :10 may be inade of amedium hard metal, and theupper free ends-may be harder metal plates -19 secured-thereto .to avoid wear-thereon. 'LThe head 15 of the lever 14 has what may he-termed an extension sleeve 20 fitted thereovenand ofizthelsame contour as the said head to provide a practical contact projectionof the head relativelyto the ends of the dogs to insurea positive action or engagementofthe head relatively to the dog ends-withwhich-it engages and between which it is located. The sleeve 20 may be of suitable thickness and may lee-replaced when desfiedorfoundnecessary and-thereby pre- I lever,.'the-upper portion of the disk or head 't is'reeessed as at21= andnormally the upper ends of the dogs 10 are held in square and firm contact with the opposite side portions of the sleeve 20 fitted over the head 15. At the point where the lever 15 projects through the upper portion of the disk or head 6 and over the opening 13, a sliding dust guard 22 is mounted between upper and lower clips 23 and 24, as clearly shown by Fig. 4, the said dust guard having a central opening 25 therein for the passage of the lever 14 therethrough. As the lever. 14 is operated the dust guard 22 moves therewith and the greater portion of the opening 13 is thus closed and the entrance of dust and grit into the improved brake is materially prevented, with advantages in the operation of the brake elements.

In the operation of the brake the lever 14 is drawn at an angle to the axle 5 below, as shown by Fig. 3, and diagonally opposite corners of the head 15 are brought to bear on corresponding corner portions of the upper ends of the dogs 10 or the plates 19 on the said dog ends, and by this means the dogs are forced apart against the resistance of the spring and the outer surfaces 26 thereof are brought to forcefully bear upon the innersurface of the wheel hub collar 8 and the moment that the lever 14 is released the head 15 thereof returns to normal position and the dogs 10 are drawn inwardly by the spring 12 to cause their upper free ends to squarely and positively engage the opposite side portions of the said head.

It will be seen from the foregoing that by a minimum movement of the brake 14 the dogs 10 will be forcefully separated to set up i a frictional engagement with the hub collar 8 owing to the two points of contact of the head with the dogs at diagonally opposite points and which sets up a uniformity in the expansion of the dogs and a strong frictional contact with the hub collar 8 to check the movement or rotation of the wheel.

The improved brake is comparatively in expensive in the cost of manufacture and may be easily applied to any axle and wheel now in use by simply securing the bracket 7 to the axle and fitting the ordinary hub collar 8 over the dogs 10 against the disk or head 6. L

It will be understood that. changes in the proportions, dimensions and minor details ofthe several parts may be adopted at will to suit various applications of the improved through the disk and having a ends of the dogs, the lever and its rectangu lar extremity having a horizontal oscillating.

movement and said extremity engaging the dogs at diagonally opposite points to expand the said dogs against the collar.

2. In a brake of the class specified, the combination with an axle having a disk secured thereon and a hub collar applied against the disk, dogs having ends pivotally secured to the outer side of the disk within the collar, a horizontally disposed lever extending through the upper portion of the disk and having a rectangular head pivotally mounted between the upper ends of the dogs, and a spring connected to the inner opposing portions of thedogs above the axle to hold the free ends of the dogs normally "in close engaging contact with the opposite side portions of the head of the lever.

3. In a brake of the class specified, the combination with an axle having a disk secured thereon and a wheel hub collar fitted thereagainst around the axle, segmental dogs pivoted at their lower ends to the disk and having upper free ends, and a horizontally disposed oscillatinglevenhaving a rectangular head pivoted between the upper free ends of the dogs and operative so that the diagonally opposite corners thereof will engage corresponding portions of the free ends of the dogs and uniformly expand the latter against the inner surface of the collar.

4. In a brake of the class specified, the combination with an axle having a disk secured thereon and a wheel hub collar disposed against the outer side thereof around the axle, of a pair of segmental dogs pivotally mounted against the outer side of the .disk and having their upper free ends normally drawn toward each other, a horizontally disposed oscillating lever extending ivotally mounted head between the upper ree ends of the dogs, and an extension sleeve removably mounted on the head of the lever to directly engage the opposite faces of the free ends of the dogs.

5. In a brake of the class specified, the combination with an axle having a disk secured thereon and a wheel hub collar dis- -posed against the outer side. thereof around the axle, a ,pair ofs egmental dogs pivotally mounted against the outer side of the disk andhaving free ends normally drawn toward each other,-a horizontally disposed oscillating lever extending through the disk and-having a pivotally mounted head of angular form disposed adjacent to the free ends of the dogs, and an extension sleeve of the same form and removably mounted on the head of the wheel to directly contact with the free ends ofthe dogs and operating to provide a positive contact between the lever and the dogs to preserve a sensitive opera-' tion of the brake at all times.

6. In a brake of the class specified, the combination with an axle having a disk secured thereon and a wheel hub collar disposed against the outer side of the disk around the axle, of spring-actuated segmental dogs pivoted on the outer side of the disk within the collar and adapted to engage the latter, the upper portion of the disk having an elongated opening therethrough, a horizontally disposed lever extending through the opening in the disk and having a head pivotally mounted between the upper free ends of the dogs, the said lever and its head being ostillatable in opposite directions, and a sliding dust guard mounted against the 15 inner side of the upper portion of the disk over the opening in the latter and through JOHN T. WESTWOOD.

- Witnesses:

C. E. MoRRIs, CARL O. SCHMIDT. 

